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Puzzle NR 09/12/10 BBDB

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Thu Dec 10, 2009 8:48 pm    Post subject: Puzzle NR 09/12/10 BBDB Reply with quote
Code:
 +-----------------------+
 | 1 . 6 | . . . | . . 7 |
 | . 8 . | . . . | . . . |
 | 7 . 3 | 6 2 . | 9 . . |
 |-------+-------+-------|
 | . . 7 | 4 . . | 6 . 8 |
 | . . 8 | . 6 . | . . . |
 | . . . | . . 8 | . 7 . |
 |-------+-------+-------|
 | . . 1 | 8 . . | 7 . . |
 | . . . | . . 4 | . 9 1 |
 | 9 . . | 1 . . | . 2 4 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu Dec 10, 2009 11:56 pm    Post subject: Reply with quote
XY (253)
Hidden UR (15)
W (39)
Hidden UR (37)
XYZ (239)
Pincer transport on 1st move
XY (372)

I found the W-Wing interesting. First, because it was linked by three strong links, not one, and second, the first 3 saw both of the 39 cells.
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sat Dec 12, 2009 5:52 pm    Post subject: Reply with quote
AIC found by extending the vertex of a potential xy-wing -125,
AIC found by extending the vertex of a potential xy-wing 35-9,
UR 37 with overlaying x-wing 7,
ER 3,
xy-wing 23-9,
w-wing 35 with pincer transport.

Every move took some time to find (for me at least).

Good puzzle.......

Ted
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat Dec 12, 2009 7:23 pm    Post subject: Reply with quote
This puzzle was a stinker. My solver's steps were tightly dependent.

Code:
   c5b5  Locked Pair                     <> 15   r45c6

 r4  b4  Locked Candidate 2              <> 2    r5c12,r6c2

finned X-Wing/turbot fish/grouped 2-String Kite: take your pick
2-Fish r26\c49                  f   200\020 <> 3    r1c4
2-Fish r6b3\c49                 fF2 101\020 <> 3    r1c4
2-Fish r6c8\r1b6                gm  110\101 <> 3    r1c4
2-Fish r6c8\c4b6                gm  110\011 <> 3    r1c4

 <25+3>  XY-Wing  r2c1/r2c9+r5c1         <> 3    r5c9

 <39+2>  XYZ-Wing r6c9/r5c9+r6c4         <> 2    r6c7

 +-----------------------------------------------------+
 |  1    25   6    |  9    8    35   |  24   34   7    |
 |  25   8    9    | *37   4   *37+5 |  1    6    23   |
 |  7    4    3    |  6    2    1    |  9    8    5    |
 |-----------------+-----------------+-----------------|
 |  23   12   7    |  4    5    9    |  6    13   8    |
 |  35   15   8    | *37+2 6   *37   |  24   134  9    |
 |  6    9    4    |  23   1    8    |  5    7    23   |
 |-----------------+-----------------+-----------------|
 |  4    3    1    |  8    9    2    |  7    5    6    |
 |  8    6    2    |  5    7    4    |  3    9    1    |
 |  9    7    5    |  1    3    6    |  8    2    4    |
 +-----------------------------------------------------+
 # 22 eliminations remain

 r25c46  <37> UR Type 6                  <> 7    r2c6,r5c4

         BUG+1                           =  3    r5c8
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